I have Speakout as a pay as you go service but it doesn't support sms. It seems to work if I text phone to phone, but I am using an app on my iphone from Air Canada. It is suppose to forward any delays/cancellations on my saved flights to me via sms. As a backup it can also send me an email. The problem is Speakout doesn't support push email, and any SMS sent by Air Canada doesn't get through. I don't know much about SMS, but was thinking maybe I could get the app to send the SMS to my voip.ms phone number and somehow get that message forwarded to my cell phone and it may get sent?